On the left, the woman looks cheerful because she has two sides of her face very similar. Her hair is fine and probably she has a sensitive personality.
On her right the man has an unbalanced face probably because he is very moody. In addition his eyes are close together and it’s indicative of a short-tempered character.
The other woman looks to be cheerful, because she has the two sides of her face very similar.
The younger man looks sarcastic because he has a long upper lip.